Superman & Lois's penultimate episode, "To Live and Die Again," sets the stage for the final confrontation by reuniting Superman with Doomsday. Lex Luthor, revealed as the series' true antagonist, manipulates Doomsday while simultaneously plotting against Superman's family. The episode also focuses on the Kent sons' growth as heroes, highlighting their evolving abilities and emotional development. Ultimately, the episode emphasizes the human element in Superman's life, contrasting the Kent family's bonds with Lex's isolation and cruelty, thereby setting up the final battle between Superman and Lex. The series finale promises a classic Superman and Lex showdown, concluding the show's story arc.